I am happy to announce that Curvy now supports the huge memory advantages of upgrading to 64bit.
32bit systems only allow for 4Gb of memory - which can get quickly eaten up by a sculpting app with millions of polies. 64bit lets the app use as much memory as it likes - perfect for complex 3D scenes.
If you run a 64bit system Steam will now automatically run the 64bit version of Curvy for you.